public void GetEvenPositionsStringBuilder_IsCorrectWorkOfMethodWithEvenLength()
        {
            StringBuilder inputString = new StringBuilder("qwqwqw");
            string        expected    = "qqq";

            GetterStringWithEvenSymbols evener = new GetterStringWithEvenSymbols(inputString);
            string actual = evener.GetEvenPositionsStringBuilder().ToString();

            Assert.Equal(expected, actual);
        }
        public void GetEvenPositionsStringBuilder_IsEmptyString()
        {
            StringBuilder inputString = new StringBuilder(string.Empty);
            string        expected    = string.Empty;

            GetterStringWithEvenSymbols evener = new GetterStringWithEvenSymbols(inputString);
            string actual = evener.GetEvenPositionsStringBuilder().ToString();

            Assert.Equal(expected, actual);
        }